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Erich Hoyt's work is "very much at the forefront of work on marine protected areas," [34] [driving] the shift from taxon-oriented protectionism (e.g., the Marine Mammal Protection Act) to more ecosystem-oriented approaches to conservation [and] marking...the growing relative importance of marine conservation vs. terrestrial conservation." [35]
Marine mammals comprise over 130 living and recently extinct species in three taxonomic orders. The Society for Marine Mammalogy, an international scientific society, maintains a list of valid species and subspecies, most recently updated in October 2015. [1] This list follows the Society's taxonomy regarding and subspecies.
Marine mammals are mammals that rely on marine (saltwater) ecosystems for their existence. They include animals such as cetaceans ( whales , dolphins and porpoises ), pinnipeds ( seals , sea lions and walruses ), sirenians ( manatees and dugongs ), sea otters and polar bears .
The family Balaenidae, the right whales, contains two genera and four species. All right whales have no ventral grooves; a distinctive head shape with a strongly arched, narrow rostrum, bowed lower jaw; lower lips that enfold the sides and front of the rostrum; and long, narrow, elastic baleen plates (up to nine times longer than wide) with fine baleen fringes.
The fourth volume is devoted to marine mammals, which include the largest mammals on earth, the whales, as well as dolphins, ear seals, walrus, earless seals, dugongs, and manatees. It covers 19 families and the details to the taxonomy, range, habitat, reproduction, behavior, and conservation status of 147 species.
The Ocean World of Jacques Cousteau by Jacques Cousteau is an encyclopedia in 21 volumes, that forms an encyclopedia of marine life. [ 1 ] It was published between 1973 and 1978.
Encyclopedia of Marine Mammals. San Diego: Academic Press. pp. 1083–1086. ISBN 978-0125513401. Berta A (2012). "5. Diversity, Evolution, and Adaptation of Sirenians and Other Marine Mammals". Return to the Sea: The Life and Evolutionary Times of Marine Mammals. Berkeley: University of California Press. pp. 127– 149. ISBN 978-0-520-27057-2.
A researcher fires a biopsy dart at an orca.The dart will remove a small piece of the whale's skin and bounce harmlessly off the animal. Cetology (from Greek κῆτος, kētos, "whale"; and -λογία, -logia) or whalelore (also known as whaleology) is the branch of marine mammal science that studies the approximately eighty species of whales, dolphins, and porpoises in the scientific ...
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